Attachment for magnetos



June 23, 1925. 1,543,480

, A. s. PARKS ATTACHMENT FOR MAGNETOS Filed March 21. 1924 28 2s a i f [2 9: 3.

.u Z4 z {2 t9 Inventor:

fly 471mm a. Par/Ins Patented June 23, 1925.

UNITED STATES PATENT OFFICE...

ARTHUR PARKS, O1! SANDWICH, ILLINOIS, ASSIGNO-R T0 SANDWICH MANUFACTUR- ING CO., 0! SANDWICH, ILLINOIS, A CORPORATION OF ILLINOIS.

ATTACHMENT FOR MAGNETOS.

Application filed March 21, 1924. Serial No. 700,770.-

To all whom it may comer n:

Be it known that I, ARTHUR S. PARKS, a citizen of the United States, and resident of Sandwich, county of De Kalb and State of Illinois, have invented certain new and useful Improvements in Attachments for Mag netos, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

This invention relates to internal combustion engines, and more particularly to magnetos therefor. One of the objects of the invention is the provision of new and im roved means for manually controlling the lgnition system of an internal combustion engine whereby an explosive charge'in the engine may be ignited at will by the operator.

Other objects of the invention are the provision of means for manually operating the ignition system, that is simple in construction, cheap to manufacture, eflicient in o eration, easily assembled and that is not likely to become broken or get out of order.

Other and funther objects and advantages of the invention will appear from the following description, taken in connection with the accompanying drawings, in WlllCl1--- Fig. 1 is a side elevation of a portion of a stationary engine with the attachment in position thereon; I I

Fig. 2 is an end elevation of a magneto, with the attachment in position thereon;

3 is a section on line 3-3 of Fig. 2; and

Fig. 4 is a perspective view of the attachment.

On the drawing, the reference character 8 designates an internal combustion engine which for simplicity of illustration and convenience in description is disclosed as a stationary engine of the single cylinder type. It is understood however that it may be used on other types of internal combustion engines. The engine is provided with an ignition system comprising a magneto 9 having a reciprocating armature 11, a rocker arm 12 for reciprocating said armature, and a tripping finger 13 carried bythe reciprocating push rod 14 for operating the rocker arm 12 against the tension of the spring 15, all of which are of well known construction.

The rocker arm 12 is journaled on the rocker arm shaft 16 which is rigidly secured to the support 17 The outer end 18 of the rocker arm 12 is provided with an open ended slot which engages a pin 19 in the lower bifurcated member or yoke 20 rigidly secured to the armature 11. The pin 19 is provided with an extended head 21 that is adapted to be engaged by the manually operated lever as will presently appear.

In the starting of internal combustion engines, and especially of engines of the stationary type where no starting devices are employed, it is desirable that manually operated means be provided for igniting the charge when the same has been drawn into the cylinder during the initial movement of the piston. A simple device for this purpose has been provided, and the same will now be described.

The rocker arm shaft 16 is provided with an extension 23 on which is journaled the manually controlled lever or handle 24. The lever 24 is provided with a finger 25 which is adapted to engage the extension 21 on the pin 19 for reciprocating the armature 11.

Suitable means are provided for holding the lever 24 stationa y in inoperative position when it is not desired to employ the same. As shown, the outer end of the shaft is provided with a reduced portion 26 on which is mounted a spring 27 one end of which is connected to said shaft 16 and its other end to the lever 24. The spring 27 is located in the co-unterbore 28 in the hub of the lever 24.

The outer end of the lever 24 is provided with shoulders 29 and 30 which are adapted to engage a pin'31in the outer end of the shaft'16 for limitingthe rotation of the lever 24 on the shaft 16. The shoulders are so arranged that they will permit sufficient movement of the lever 24to operate the armature 11 for causing a spark across the terminals of the spark plug for igniting the charge in the usual manner. The spring 27 normally holds the shoulder 30 against the pin 31 whereby the finger 25 is held out of contact with the extension 21 during the normal operation of the engine.

In order that the lever 24 will be easily manipulated and at the same time be out of the Way the same is mounted on the shaft 16 in such a manner that it extends alongside the casing of the magneto 9. 'By this arrangement the lever 24 may be easily manipulated without danger of skinning the knuckles or otherwise injuring the hand, by

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placing the palm of the left hand on the bandle or lever 2t and engaging the end ot the magnet-o casing with the ends of the fingers and thereby operating said lever by the tingers and the hand.

i The device is especially adapted to be employed in connection with internal combastion engines of the type in which the inlet or induction valve is operated by suction. In the operation of the device, the fly wheel is rotated to draw in a charge and before the piston reaches dead center the wheel is reversed or rotated in the opposite direction until the charge is compressed the desired amount, after which it exploded by operating the handle 24:. The impetus given the tlv wheel by thi manually compressed charge will be suli but to start the engine, after which it operates automatically in the usual manner. In starting coniparati'vely small engines the tly wheel 32 of the engine mav be rotated with the right hand to the position tiringthe charge while the lettlmnd operates the handle or lever 9 itor igniting the same. ll'hile the above is convenient method of starting the engine it is nndcn stood that the mechanism may be manipulated othemvise as desired.

It. is thought from the foregoing taken in connection with the accompanying drawings that the. construction and operation of my device will be apparent to those skilled in the art, and that various changes in size, shape, proportion and details of construction may be made without departing trom the spirit and scope of the appended claims.

ll claim as my invention:

1. In a magneto, a reciprocating armature, power means for operating said armature, a single unitary member mounted on said magneto for manually operating said armature, said member terminating in a movable iandlc, a spring for normally holding said handle in inoperativ position, and means on the said handle for limiting the movement there-0t.

In a magneto provided with a reeiprorating arimiturc, a shaft, power actuated mechanism on said shaft tor operating said armature, a handle jonrnaled on said shatttor mainnilly operating said armature, and a spring on said shaft for holding said handle in stationary position during the normal operation of said magneto.

3. In a magneto provided with a casing and a movable armature, power actuated mechanism for operating said armature, a movable handle independent of said mechanism for manually operating said armature, said handle extending adjacentto a wall of said casing whereby the hand and fingers of the operator may engage said handle and wall respectively for operating said handle, and independent means for holding the said handle in inoperative position and hunting the movementthereof.

4. In a magnet-o provided with a reciprocating armature, a shaft, means on said shaft for operating said armature, a handle provided with a hub journaled on said shaft for manually operating said armature, said hub being provided with a shoulder on one side and a counterbore on the other, means for holding said handle on said shaft and resilient means within said connterbore for holding said shoulder against; said last named means during the normal operation of said magneto.

5. In con'ihination, a magneto comprising a casing, an arn'iature for said n'iagneto, power operated means for operating said armature, movable means on said magneto indepemlent of said casing {or manually operating said armature, and independent means independent of said casing for normally holding said second named means in lHOPGl'tIl'lVG position, and limiting the movement thereof.

6. In a magneto having an armature, a rocker-arm mounted on a shaft for actuating the said, armature, means for rocking said arm, and a means indepei'ident of the said tirst-nientioned means and mounted on th said shaft, for operating the said arm.

7. In a magneto having an armature, a rocl-Ier-arm mounted on a shaft for actuating the said arn'iature, means for rocking said arm, and a means independent of and adjacent to the said first mentioned means and mounted on the said shaft for operating said arm. i

S. In a magneto lmving a reciprocablc armature, a. rocker-arm mounted. on a shaft tor reciprocating the said armature, power actuated mechanism for rocking the said arm, and a manually controlled lever mounted on the said shaft for operating the said arm.

ARTHUR S. PARKS.

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